drm/panel: Extend ACX424AKP bindings to ACX424AKM

The panel ACX424AKP seems to only be used in prototypes, whereas
real products use the 10 pixels shorter ACX424AKM. Extend the
ACX424AKP bindings to also cover the ACX424AKM. The ACX424AKM
was used in a few different mobile phones from Sony Mobile.

Cc: devicetree@vger.kernel.org
Cc: phone-devel@vger.kernel.org
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220103093501.637323-1-linus.walleij@linaro.org

Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml

@@ -4,7 +4,12 @@
 $id: http://devicetree.org/schemas/display/panel/sony,acx424akp.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Sony ACX424AKP 4" 480x864 AMOLED panel
+title: Sony ACX424AKP/ACX424AKM 4" 480x864/480x854 AMOLED panel
+
+description: The Sony ACX424AKP and ACX424AKM are panels built around
+  the Novatek NT35560 display controller. The only difference is that
+  the AKM is configured to use 10 pixels less in the Y axis than the
+  AKP.
 
 maintainers:
   - Linus Walleij <linus.walleij@linaro.org>
@@ -14,7 +19,9 @@ allOf:
 
 properties:
   compatible:
-    const: sony,acx424akp
+    enum:
+      - sony,acx424akp
+      - sony,acx424akm
   reg: true
   reset-gpios: true
   vddi-supply: